Here's something I never thought I'd write: You have to watch The Mountain! Actually, just the Nov. 3 episode. That's when Buffy/Angel grad James Marsters guest-stars as the father of the Penn Badgley character. According to a WB rep, there's "a chance" Marsters could recur which would mean you'd have to watch more than one episode of The Mountain. Scary but true.
(Disclosure: TV Guide is owned by CBS Interactive, a division of ViacomCBS.)